The color of ruby is caused by traces of chromiuim. Color is the most significant factor affecting a ruby’s value. Rubbies are avalible in rich and red to dark red and orangy red to purplish red. The most sought-after red sometimes with a hint of purple, called “pigeon’s blood” in the trade.
Corundum
9
Excellent
Afghanistan, Greenland, Kenya, Madascar, Malawi, Mozambique, Mymmar, Nepal, Pakistan, Sri Lanka, Tajikistan, Thailand, Vietnam.